/************************************************************************
Copyright 2003, 2004, 2005, 2006, 2007, 2008 Grid Technology Research Center,
National Institute of Advanced Industrial Science and Technology.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
************************************************************************/

package jp.aist.gtrc.plus.scheduler.specific.pbs.batch.request;

import jp.aist.gtrc.plus.scheduler.specific.pbs.batch.DISDecodable;
import jp.aist.gtrc.plus.scheduler.specific.pbs.batch.DISDecoder;
import jp.aist.gtrc.plus.scheduler.specific.pbs.batch.DISEncodable;
import jp.aist.gtrc.plus.scheduler.specific.pbs.batch.DISEncoder;
import jp.aist.gtrc.plus.scheduler.specific.pbs.util.PBSErrorCode;
import jp.aist.gtrc.plus.scheduler.specific.pbs.util.PBSException;

public abstract class BatchRequest implements DISEncodable, DISDecodable{

	private BatchRequestHeader header;
	private static final BatchRequestExtentionNull extension
		=  new BatchRequestExtentionNull();

	private static String defaultRequester = "Scheduler";

	protected BatchRequest(){

		this(defaultRequester);

	}

	protected BatchRequest(String requester){

		header = new BatchRequestHeader(getRequestType(), requester);

	}

	protected BatchRequest(BatchRequestHeader header) {

		this.header = header;
	}

	public static void setDefaultRequester(String requester) {

		if ((requester != null) && (requester.length() > 0))
			defaultRequester = requester;
		else
			assert(false);

	}

	public final void encode(DISEncoder encoder){

		header.encode(encoder);
		encodeBody(encoder);
		extension.encode(encoder);

	}

	protected abstract void encodeBody(DISEncoder encoder);
	public abstract BatchRequestType getRequestType();

	public void decode(DISDecoder decorder) throws PBSException {

		/*
		 * Must override by subclass if it's necessary
		 */
		assert(false);
		throw new PBSException(PBSErrorCode.INTERNAL);

	}

	public String toString(){

		return header.toString();
	}

}
